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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 119 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Double 83 =
  2. 2.Double 14 =
  3. 3.Double 51 =
  4. 4.Double 19 =
  5. 5.Half of 116 =
  6. 6.Half of 144 =
  7. 7.Half of 76 =
  8. 8.Half of 112 =
  9. 9.Double 33 =
  10. 10.Double 72 =
  11. 11.Double 86 =
  12. 12.Half of 32 =
  13. 13.Double 69 =
  14. 14.Half of 84 =
  15. 15.Double 49 =
  16. 16.Double 47 =
  17. 17.Half of 142 =
  18. 18.Half of 42 =
  19. 19.Double 81 =
  20. 20.Half of 196 =
  21. 21.Double 37 =
  22. 22.Double 68 =
  23. 23.Double 98 =
  24. 24.Half of 114 =
  25. 25.Double 77 =
  26. 26.Double 61 =
  27. 27.Double 92 =
  28. 28.Half of 136 =
  29. 29.Double 25 =
  30. 30.Half of 82 =
  31. 31.Double 89 =
  32. 32.Half of 88 =
  33. 33.Double 58 =
  34. 34.Half of 106 =
  35. 35.Half of 38 =
  36. 36.Double 36 =
  37. 37.Half of 62 =
  38. 38.Double 53 =
  39. 39.Half of 122 =
  40. 40.Half of 26 =

Answer key

  1. 166
  2. 28
  3. 102
  4. 38
  5. 58
  6. 72
  7. 38
  8. 56
  9. 66
  10. 144
  11. 172
  12. 16
  13. 138
  14. 42
  15. 98
  16. 94
  17. 71
  18. 21
  19. 162
  20. 98
  21. 74
  22. 136
  23. 196
  24. 57
  25. 154
  26. 122
  27. 184
  28. 68
  29. 50
  30. 41
  31. 178
  32. 44
  33. 116
  34. 53
  35. 19
  36. 72
  37. 31
  38. 106
  39. 61
  40. 13

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